Check Engine Light

If you mean ... why the crank won't turn when the key is on and the acc.'s will turn, Well sounds like crank shaft is locked up. When the crank bearings try to pile up on each other and jam the crankshaft in it's final resting place, till rebuild.

most times it is a bad coil pack there are three ignition coils mounted on top of the ignition module. one coil supplys 2 cylinders with spark. original coils have the cylinder number stamped on the coil so you know what coil feeds #y cylinder. 80 percent its a coil failure 20 percent the module fail and signal is interrupted to coil.if you don't want to just change coil.without proof,you can switc coil with another remember to mark the number of the cylinders on the ignition wires before you switch coils as the coils have a firing order that must be followed. when you switch coils and test drive check the coses for misfire again if the miss moves to a different cylinder number the coil is bad. if the number is still four with the coils switched,the ignition module if probably bad, these coils usually tes good when you ohm test them but these coils usually break down under engine load and heat,your coil can pass a ohm test but still be bad. there cheap enough just put new #4 coil in it. p.s you need a 5.5 millimeter socket to remove coils

In US it says "SERVICE ENGINE SOON" in Canada it looks like an engine.

Use a Mercedes specific or OBDII generic scan tool.

The check engine light (service engine soon) comes on and stays on when a problem is detected by the self diagnosis system of your vehicle. Generally, the problem is in the emissions or something that is affecting the effectiveness of the emissions, but other causes can trigger the light to come on, too. To determine the cause, the vehicle will need to be taken to a parts store or a shop that has an OBD2 scanner, or for 1995 and earlier models, an OBD1 scanner, While a scanner will not give you the magic answer, it will give you a code that narrows down the problem area.

Not usually....No. Take it in to AutoZone and have them check the codes for you.

You use a scan tool after repairing the cause of the code that turned the light on.

On my 94 MPV the Mitchell on demand repair manual says to remove the panel in the dash where your display is, their is a small screw, take screw out of the place it is and put it in the other place provided. I haven't done this yet but my light stays on also, they come on automatically at 80,000 miles. Hope that helps. Disconnecting the battery won't reset it.

A friend of mine told me to disconnect the battery. Not 100% sure, just what i was told.

u need to know what codes its reading go to auto zone and have it read for free

First you need to repair the problem or the light will just come back on. The charge varies greatly from place to place. Try disconnecting the battery for 1 hour which works on some vehicles.

code PO442 Evap sys leak There could bethe gas cap or a crack in the plastic of your charcoal canister. A hose could be pulled off, or broken, or split, or removed by a mechanic and never put back on. The pressure sender could be broken and never signalling the ECU. The solenoid could be broken and never performing the EVAP purge. Any of the wires to the solenoid or the sensor could be broken, shorted, or unhooked. they make a smoke tester to find small leaks in evap system most dealers have them cost about$100 to diag hope this helps

Emmissions problem. HAVE THE ENGINE CHECKED!

Probably the number two ignition coil. Also check the spark plug and the wiring to the coil.

The procedure is different with different manufacturers and models.

Switch ignition off, press & hold the button to the left of the speedo while switching ignition on. After 10 seconds the new interval will appear in the display accompanied by a beep. Release the button. Switch ignition off.

take it to the autozone they check the engine light for free

It means the computer has detected a problem with the emissions system. Make sure your gas cap is tight. If that is not the problem, then you need to have the computer scanned for a fault code. This code you give you and idea where to look. Auto Zone & Advance Auto Parts will do a free scan in most states. The ZX2's are notorious for having temprature sending unit problems...a quick fix to get the light to go off is to make sure the radiator is full first....then if that is ok disconnect the RED or POSITIVE battery terminal for about 5 - 10 minutes. This resets the computer. You'll have to reprogram your radio and clock but the CES light will be out. If it comes back on then have it checked like above.

Disconnect the positive battery cable from the battery, and hook it back up. This should reset the internal cpu, if the problem still exists the light will come back on after about 50-100 miles of drive time.

Just turn the ignition key one click forward and press the gas pedal 5 or 6 times should do it

The light could come on if you needed a tune up. Cars have sensors that will make the light come on for many different reasons, such as a misfire because the plugs or wires need replacing. It is best to check the code that caused the light to come on.

take it to an autozone and have them do a code test on it its free and after they are done ask them to erase the codes that should shut it off???

Possibly, along with hundreds of other things. You need to have it checked for codes.

You're going to have to take it to the shop. They have to hack in to it. Unless you're trying to steal the radio, It's nearly impossible to get the code.

Either disconnect your negative battery terminal for 15 minutes or go to Autozone and they will diagnose and erase your code for free. -broncomudder89 Autozone does not diagnose. "Educated" guess at best. They sell parts. The " check engine light" is by far one of the most misunderstood technological advances It is a warning light that is illuminated when there is a problem affecting the EMISSIONS of the vehicle.. Don't let it bother you as it is a good thing once you understand it. One point that was brought up a recent meeting of technicians was that the amount of hydrocarbons is greater when the gas cap is left off than when the engine is running. Hydrocarbons are part of pollution emitted as gasoline evaporates. Going a step farther, one facet of the emission system is the "Evaporative" portion. This is when the fumes from the gasoline are leaking from the system into the outside air. This is one part of the emission system that can trigger a check engine light. I would say a small percentage of the vehicles that have a check engine light are the result of a loose or inadequate gas cap. But understand that many scenarios are possible with the "check engine light" The vehicle's powertrain computer (note that some vehicles have multiple computers aside from the powertain computer) will run a series of self-tests. They will only run under certain criteria. And they are different from manufacturer to manufacturer. Some self-tests or